Crankshaft MD138992 For Mitsubishi Engine 4G13

Crankshaft for all-new Mitsubishi 4G13 engine (MD138992)

The Mitsubishi 4G13 crankshaft is designed with a bore of 71.0 mm and a stroke of 82.0 mm. Typically manufactured from high-strength cast iron, it features hardened journals and a counterweight design aimed at minimizing vibration; its OEM part number is generally MD138992.

Description

Key Specifications and Parameters
Engine Displacement: 1.3 L (1,298 cc)
Stroke: 82.0 mm
Material: Cast iron or steel
Tensile Strength: 800 – 830 MPa
Heat Treatment: Nitriding (Hardness > 48 HRC)
Common OEM Part Numbers: MD138992, MD327703

Critical torque specifications: Precise tightening sequences and torque values for the relevant components are essential: Main bearing caps: 10–12 ft-lbs (13.5–16.2 N⋅m) + 90° + 45°;
Connecting rod caps: 17–20 ft-lbs (23.1–27.1 N⋅m) + 90° + 45°;
Crankshaft pulley bolt: 59–72 ft-lbs (80–98 N⋅m);
Flywheel bolts: 45–59 ft-lbs (61–80 N⋅m).